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-   -   how to bend a revolver mainspring? (http://smith-wessonforum.com/s-w-smithing/91580-how-bend-revolver-mainspring.html)

jeffrey 07-06-2009 05:10 PM

how to bend a revolver mainspring?
 
I would like to know how to bend a stock S&W revolver mainspring to get a lighter trigger pull. I know that I can just buy reduced power Wolf springs and have bought them in the past. But having put Wolf springs in a bunch of guns, I now have a bunch of stock mainsprings and Id like to see what I can do with them.

A gunsmith once did this for me and the result was pretty good, not quite as smooth or light as a Wolf, but noticeably better than before. Also, this bent spring gave me a trigger pull that was a bit heavier than a Wolf spring and worked with primers that were too hard for that particular gun using a Wolf reduced power mainspring.

I got a nylon wedge from Brownells (that they advertise for this purpose) but I don't know how to use it.

Thanks for any advice you all can provide!

bountyhunter 07-06-2009 06:38 PM

You need to do what's called a "mandrel" bend which just means bend it over a curved form so you don't put a corner in it. I get three screwdrivers with round plastic handles (maybe 1 1/4" diameter) and set them up so the bend is centered about 2/3 of the way up from the bottom tip of the spring. Two screwdrivers on one side, one on the other so you are bending across the single one.

Before you start, lay the spring sideways and ink a line showing the starting curve so you can compare it after you bend it. To reduce strength, bend a little more curve into it. To make it stronger, you flatten it some.

jeffrey 07-08-2009 12:49 AM

Thanks bountyhunter. I will try it.

imashooter2 07-08-2009 08:11 AM

I like to bend mine similar to the Wilson or Miculek reduced springs and use a simple jig made of 2 nails set into a 2x4. Use one small nail that will engage the hooks and add another larger nail about an inch away to use as the bending point. Easy to control and repeatable.

jeffrey 07-08-2009 04:10 PM

Thanks Imashooter. Does anyone use the nylon wedge from Brownells? I'm curious because now that I've got it, I might as well use it.

bountyhunter 07-08-2009 05:49 PM

Quote:

Originally Posted by jeffrey (Post 1006516)
Thanks Imashooter. Does anyone use the nylon wedge from Brownells? I'm curious because now that I've got it, I might as well use it.

Maybe you could post the part number, I never heard of it.

jeffrey 07-08-2009 09:28 PM

"Nylon wedge" is the name and 080-722-100 is the part number. Thanks for taking the time to give this some thought.

imashooter2 07-08-2009 11:12 PM

I can't see how that could be used except to wedge in between the frame and the spring to try and bend it while still installed in the gun...

I can't picture someone actually doing that, but I can't see any other way to use it.

bountyhunter 07-09-2009 01:28 AM

I don't think I would use that.

sal1911a1 07-09-2009 08:16 AM

springs
 
Jeff

Don't bend springs, or cut coils from trigger rebound springs all that is bad bad bad:(


If you must, and have to have a lighter spring(God knows why) pick a Wolf spring and install it, I have seen too many shooters turn there revolvers into junk real fast, improper bending will change smooth action into ****. Also add unnecessary stress to adjoining parts, remember the trigger pull is a long cycle all the parts depend on one another for fit and proper spring tension,

The short answer install a Wolf Type II is reduced power, Type one is factory power. They have a bend in the proper area and the right temper.

tomcatt51 07-09-2009 09:55 AM

Quote:

Originally Posted by jeffrey (Post 1004255)
I would like to know how to bend a stock S&W revolver mainspring to get a lighter trigger pull.

I got to look at a Bang mainspring this last weekend. It has a bend at the very top immediately under the hooks. I can't easily duplicate that on a stock spring. It had exactly the same width profile as stock and seemed to be the same thickness, I had both springs in my hands but no caliper available.


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